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[e2e] Decay the repro's poke pump instead of stopping at the budget - #3561

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VaguelySerious merged 6 commits into
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peter/repro-poke-decay
Aug 21, 2026
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[e2e] Decay the repro's poke pump instead of stopping at the budget#3561
VaguelySerious merged 6 commits into
mainfrom
peter/repro-poke-decay

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@VaguelySerious

@VaguelySeriousVaguelySerious commented Aug 14, 2026

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Follow-up to #3558, which landed the poke budget as a hard stop.

  • The hard stop binds: every local step-storm run spent all 64 pokes, so the back half of a ~160s run got no out-of-band writes. Dropping attempt concurrency to 3 doesn't help (runs finish in 87-96s and still spend it).
  • The pump now decays to pokeIntervalMs * POKE_DECAY_FACTOR (8) after the budget instead of stopping. Loop gain stays under 1, later rounds still get pressure.
  • That difference caught a real bug: world-local hit CORRUPTED_EVENT_LOG once in 18 step-storm runs (wrun_01M00SW88YV76AXKXQFX4Y3V1X, 87 pokes, 200s). Three passes of the merged config: zero.
  • Restored pressure pushes local runs to ~200s, which is 83% of the 240s default, so the local script raises RUN_TIMEOUT_MS to 480000. Exported values and dispatch inputs still win.
  • Lane results after the merge: step-storm, hook-storm and hook-sleep clean on all three lanes, no stuck runs, step-storm at 148-172s locally against the raised timeout. Every corruption in the run is blocked-branch.
  • The rendered config line now names the budget and decay (poke budget 64 then /8).

Merged main, which added the blocked-branch scenario (#3696). That scenario corrupts by design and stays red until a fix lands, so the lanes on this PR are red for its reasons, not this one's. Check the per-scenario breakdown: step-storm is the one this PR moves.

Two fixes the merge turned up:

Known gap, not fixed here: local hook-storm straggles ~1 branch per round by arithmetic (index * 400ms stagger vs a 2500ms watchdog), where Vercel gets 18-24 because each resume also pays ~1.5s of network latency. Retuning the local stagger or watchdog needs its own straggler numbers.

PR Checklist - Required to merge

  • 📦 pnpm changeset was run to create a changelog for this PR
  • 🔒 DCO sign-off passes (git commit --signoff)
  • 📝 Ping @vercel/workflow in a comment once the PR is ready, and the above checklist is complete

🤖 Generated with Claude Code

VaguelySeriousand others added 3 commits August 14, 2026 12:19
A hard ceiling bought the lanes their green at the cost of coverage: every
step-storm run on both local lanes spent the full 64-poke budget, so the back
half of a ~160s run applied no out-of-band writes at all. Lowering attempt
concurrency does not help — at c3 runs finish in 87-96s and still spend the
whole budget.
The pump now slows to `pokeIntervalMs * POKE_DECAY_FACTOR` (8) once the budget
is spent rather than stopping, so loop gain stays below 1 while a slow run's
later rounds keep receiving pressure. Verified locally at POKE_MAX=4 / 500ms /
decay 10: a 26.1s run sent 8 pokes, 4 at full cadence and 4 across the
remaining 24s, where unbounded sends ~52 and a hard stop sends 4.
The lanes were never comparable on this axis to begin with: a Vercel resume
pays a network round trip, so that lane's pump achieves an effective ~2.3s
interval (35-44 pokes per run) while localhost runs the full 750ms. The decayed
rate is what puts the local lanes near the lane that found the production bug,
rather than at 3x its write rate.
Also records what the saturated lanes are NOT: world-local logged zero failed
deliveries, zero handler errors and zero exhausted messages across three 14-run
passes, because its semaphore parks a message before the delivery fetch and
queue waiting never consumes the transport timeout. No retry amplification to
find. The two default-concurrency smells that did surface (world-local's 1000
in-flight deliveries, world-postgres' 50 workers per process) are noted for
their own change, not fixed here.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Signed-off-by: Peter Wielander <peter.wielander@vercel.com>
With the pump's pressure restored, world-local `step-storm` lands at 194-203s
and world-postgres at 168-175s against the harness' 240000 default — 83% of
their own timeout — while the Vercel lane finishes the same storm in 85-100s.
One slow runner at that margin turns a lane that reproduces into a lane full of
`stuck`, which is the failure this branch exists to stop.
The local script raises it to 480000. It is the one scale knob the script sets,
because it is the one whose meaning depends on every replay of every run sharing
a Node process rather than getting its own Fluid invocation; an exported value
still wins, and a workflow_dispatch input still wins.
Evidence the restored pressure is worth the timeout: on the decay config
world-local produced a CORRUPTED_EVENT_LOG (wrun_01M00SW88YV76AXKXQFX4Y3V1X, 87
pokes over 200s), which three passes of the hard-cap config never did.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Signed-off-by: Peter Wielander <peter.wielander@vercel.com>
Signed-off-by: Peter Wielander <peter.wielander@vercel.com>
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🦋 Changeset detected

Latest commit: 236253d

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🧪 E2E Test Results

Some tests failed

❌ Failed E2E Tests

▲ Vercel Production (251 failed)

astro-node (8 failed):

  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K4N5010GR0ZHR7MJ0BDNMH | 🔍 observability
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K4JFBW0GMT0E6D6Q4ZJP5F | 🔍 observability
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K4NKJ10GK2NDACM4ZTHQV5 | 🔍 observability
  • hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K4MF400GTNPRTV3K3KKTE3 | 🔍 observability
  • setAttributes start: initial attributes are seeded on run creation
  • setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
  • setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
  • setAttributes fire-and-forget: void setAttributes lands without awaiting

astro-quickjs (12 failed):

  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K4N5010GR0ZHR7MJ0BDNMH | 🔍 observability
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K4JFBW0GMT0E6D6Q4ZJP5F | 🔍 observability
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K4NKJ10GK2NDACM4ZTHQV5 | 🔍 observability
  • hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K4MF400GTNPRTV3K3KKTE3 | 🔍 observability
  • AbortController abortAnyInStepWorkflow: AbortSignal.any inside a step composes deserialized signals
  • AbortController abortListenerWorkflow: signal.addEventListener fires on the deserialized step signal
  • setAttributes start: initial attributes are seeded on run creation
  • setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
  • setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
  • setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
  • setAttributes fire-and-forget: void setAttributes lands without awaiting
  • setAttributes Promise.all of disjoint-key writes: every key lands

example-node (10 failed):

  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K4N5010GR0ZHR7MJ0BDNMH | 🔍 observability
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K4JFBW0GMT0E6D6Q4ZJP5F | 🔍 observability
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K4NKJ10GK2NDACM4ZTHQV5 | 🔍 observability
  • hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K4MF400GTNPRTV3K3KKTE3 | 🔍 observability
  • setAttributes start: initial attributes are seeded on run creation
  • setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
  • setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
  • setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
  • setAttributes fire-and-forget: void setAttributes lands without awaiting
  • setAttributes Promise.all of disjoint-key writes: every key lands

example-quickjs (12 failed):

  • webhookWorkflow | wrun_41M0K4CVGW0GJNQ7D4FAGR3SE8 | 🔍 observability
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K4JFBW0GMT0E6D6Q4ZJP5F | 🔍 observability
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K4NKJ10GK2NDACM4ZTHQV5 | 🔍 observability
  • hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K4MF400GTNPRTV3K3KKTE3 | 🔍 observability
  • AbortController abortFromStepWorkflow: step abort cancels an in-flight sibling step
  • AbortController abortThrowIfAbortedMidFlightWorkflow: throwIfAborted in a polling loop bails when abort fires
  • AbortController abortDeterministicBranchFromStepWorkflow: branches stay consistent when abort comes from a step
  • setAttributes start: initial attributes are seeded on run creation
  • setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
  • setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
  • setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
  • setAttributes fire-and-forget: void setAttributes lands without awaiting

express-node (7 failed):

  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K4N5010GR0ZHR7MJ0BDNMH | 🔍 observability
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K4NKJ10GK2NDACM4ZTHQV5 | 🔍 observability
  • resume-or-start route pattern - resumeHook retried after start() reaches the new run | wrun_41M0K4RRZJ0GW0F7N055T6B4FE | 🔍 observability
  • setAttributes start: initial attributes are seeded on run creation
  • setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
  • setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
  • setAttributes validation DX: invalid writes throw catchable FatalErrors naming rule and limit

express-quickjs (11 failed):

  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K4N5010GR0ZHR7MJ0BDNMH | 🔍 observability
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K4JFBW0GMT0E6D6Q4ZJP5F | 🔍 observability
  • hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K4MF400GTNPRTV3K3KKTE3 | 🔍 observability
  • AbortController abortDeterministicBranchFromStepWorkflow: branches stay consistent when abort comes from a step
  • setAttributes start: initial attributes are seeded on run creation
  • setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
  • setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
  • setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
  • setAttributes fire-and-forget: void setAttributes lands without awaiting
  • setAttributes Promise.all of disjoint-key writes: every key lands
  • setAttributes validation DX: invalid writes throw catchable FatalErrors naming rule and limit

fastify-node (7 failed):

  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K4N5010GR0ZHR7MJ0BDNMH | 🔍 observability
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K4JFBW0GMT0E6D6Q4ZJP5F | 🔍 observability
  • hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K4MF400GTNPRTV3K3KKTE3 | 🔍 observability
  • setAttributes start: initial attributes are seeded on run creation
  • setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
  • setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
  • setAttributes fire-and-forget: void setAttributes lands without awaiting

fastify-quickjs (12 failed):

  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K4N5010GR0ZHR7MJ0BDNMH | 🔍 observability
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K4JFBW0GMT0E6D6Q4ZJP5F | 🔍 observability
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K4NKJ10GK2NDACM4ZTHQV5 | 🔍 observability
  • hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K4MF400GTNPRTV3K3KKTE3 | 🔍 observability
  • AbortController abortAnyInStepWorkflow: AbortSignal.any inside a step composes deserialized signals
  • setAttributes start: initial attributes are seeded on run creation
  • setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
  • setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
  • setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
  • setAttributes fire-and-forget: void setAttributes lands without awaiting
  • setAttributes Promise.all of disjoint-key writes: every key lands
  • setAttributes workflow throws after awaited setAttributes: attribute still persists on the failed run

hono-node (9 failed):

  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K4N5010GR0ZHR7MJ0BDNMH | 🔍 observability
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K4JFBW0GMT0E6D6Q4ZJP5F | 🔍 observability
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K4NKJ10GK2NDACM4ZTHQV5 | 🔍 observability
  • hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K4MF400GTNPRTV3K3KKTE3 | 🔍 observability
  • resume-or-start route pattern - resumeHook retried after start() reaches the new run | wrun_41M0K4RRZJ0GW0F7N055T6B4FE | 🔍 observability
  • setAttributes start: initial attributes are seeded on run creation
  • setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
  • setAttributes fire-and-forget: void setAttributes lands without awaiting
  • setAttributes workflow throws after awaited setAttributes: attribute still persists on the failed run

hono-quickjs (10 failed):

  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K4N5010GR0ZHR7MJ0BDNMH | 🔍 observability
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K4JFBW0GMT0E6D6Q4ZJP5F | 🔍 observability
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K4NKJ10GK2NDACM4ZTHQV5 | 🔍 observability
  • AbortController abortListenerWorkflow: signal.addEventListener fires on the deserialized step signal
  • setAttributes start: initial attributes are seeded on run creation
  • setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
  • setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
  • setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
  • setAttributes fire-and-forget: void setAttributes lands without awaiting
  • setAttributes Promise.all of disjoint-key writes: every key lands

nest-node (12 failed):

  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K4N5010GR0ZHR7MJ0BDNMH | 🔍 observability
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K4JFBW0GMT0E6D6Q4ZJP5F | 🔍 observability
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K4NKJ10GK2NDACM4ZTHQV5 | 🔍 observability
  • hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K4MF400GTNPRTV3K3KKTE3 | 🔍 observability
  • hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue | wrun_41M0K4R4BC0GQDMPMG1R3NM7GZ | 🔍 observability
  • setAttributes start: initial attributes are seeded on run creation
  • setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
  • setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
  • setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
  • setAttributes fire-and-forget: void setAttributes lands without awaiting
  • setAttributes Promise.all of disjoint-key writes: every key lands
  • setAttributes validation DX: invalid writes throw catchable FatalErrors naming rule and limit

nest-quickjs (14 failed):

  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K4N5010GR0ZHR7MJ0BDNMH | 🔍 observability
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K4JFBW0GMT0E6D6Q4ZJP5F | 🔍 observability
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K4NKJ10GK2NDACM4ZTHQV5 | 🔍 observability
  • hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K4MF400GTNPRTV3K3KKTE3 | 🔍 observability
  • AbortController abortAnyInStepWorkflow: AbortSignal.any inside a step composes deserialized signals
  • AbortController abortDeterministicBranchFromStepWorkflow: branches stay consistent when abort comes from a step
  • setAttributes start: initial attributes are seeded on run creation
  • setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
  • setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
  • setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
  • setAttributes fire-and-forget: void setAttributes lands without awaiting
  • setAttributes Promise.all of disjoint-key writes: every key lands
  • setAttributes workflow throws after awaited setAttributes: attribute still persists on the failed run
  • setAttributes validation DX: invalid writes throw catchable FatalErrors naming rule and limit

nextjs-turbopack-node (5 failed):

  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K4N5010GR0ZHR7MJ0BDNMH | 🔍 observability
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K4NKJ10GK2NDACM4ZTHQV5 | 🔍 observability
  • hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K4MF400GTNPRTV3K3KKTE3 | 🔍 observability
  • setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
  • setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly

nextjs-turbopack-quickjs (10 failed):

  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K4N5010GR0ZHR7MJ0BDNMH | 🔍 observability
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K4JFBW0GMT0E6D6Q4ZJP5F | 🔍 observability
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K4NKJ10GK2NDACM4ZTHQV5 | 🔍 observability
  • hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K4MF400GTNPRTV3K3KKTE3 | 🔍 observability
  • AbortController abortThrowIfAbortedMidFlightWorkflow: throwIfAborted in a polling loop bails when abort fires
  • setAttributes start: initial attributes are seeded on run creation
  • setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
  • setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
  • setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
  • setAttributes fire-and-forget: void setAttributes lands without awaiting

nextjs-webpack-node (10 failed):

  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K4N5010GR0ZHR7MJ0BDNMH | 🔍 observability
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K4JFBW0GMT0E6D6Q4ZJP5F | 🔍 observability
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K4NKJ10GK2NDACM4ZTHQV5 | 🔍 observability
  • hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K4MF400GTNPRTV3K3KKTE3 | 🔍 observability
  • setAttributes start: initial attributes are seeded on run creation
  • setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
  • setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
  • setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
  • setAttributes fire-and-forget: void setAttributes lands without awaiting
  • setAttributes Promise.all of disjoint-key writes: every key lands

nextjs-webpack-quickjs (8 failed):

  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K4N5010GR0ZHR7MJ0BDNMH | 🔍 observability
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K4JFBW0GMT0E6D6Q4ZJP5F | 🔍 observability
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K4NKJ10GK2NDACM4ZTHQV5 | 🔍 observability
  • setAttributes start: initial attributes are seeded on run creation
  • setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
  • setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
  • setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
  • setAttributes fire-and-forget: void setAttributes lands without awaiting

nitro-node (8 failed):

  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K4N5010GR0ZHR7MJ0BDNMH | 🔍 observability
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K4JFBW0GMT0E6D6Q4ZJP5F | 🔍 observability
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K4NKJ10GK2NDACM4ZTHQV5 | 🔍 observability
  • hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K4MF400GTNPRTV3K3KKTE3 | 🔍 observability
  • setAttributes start: initial attributes are seeded on run creation
  • setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
  • setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
  • setAttributes fire-and-forget: void setAttributes lands without awaiting

nitro-quickjs (9 failed):

  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K4N5010GR0ZHR7MJ0BDNMH | 🔍 observability
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K4NKJ10GK2NDACM4ZTHQV5 | 🔍 observability
  • AbortController abortDeterministicBranchFromStepWorkflow: branches stay consistent when abort comes from a step
  • setAttributes start: initial attributes are seeded on run creation
  • setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
  • setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
  • setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
  • setAttributes fire-and-forget: void setAttributes lands without awaiting
  • setAttributes workflow throws after awaited setAttributes: attribute still persists on the failed run

nuxt-node (10 failed):

  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K4N5010GR0ZHR7MJ0BDNMH | 🔍 observability
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K4JFBW0GMT0E6D6Q4ZJP5F | 🔍 observability
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K4NKJ10GK2NDACM4ZTHQV5 | 🔍 observability
  • hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K4MF400GTNPRTV3K3KKTE3 | 🔍 observability
  • setAttributes start: initial attributes are seeded on run creation
  • setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
  • setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
  • setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
  • setAttributes fire-and-forget: void setAttributes lands without awaiting
  • setAttributes Promise.all of disjoint-key writes: every key lands

nuxt-quickjs (10 failed):

  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K4N5010GR0ZHR7MJ0BDNMH | 🔍 observability
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K4JFBW0GMT0E6D6Q4ZJP5F | 🔍 observability
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K4NKJ10GK2NDACM4ZTHQV5 | 🔍 observability
  • hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K4MF400GTNPRTV3K3KKTE3 | 🔍 observability
  • AbortController abortThrowIfAbortedMidFlightWorkflow: throwIfAborted in a polling loop bails when abort fires
  • setAttributes start: initial attributes are seeded on run creation
  • setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
  • setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
  • setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
  • setAttributes fire-and-forget: void setAttributes lands without awaiting

python-node (8 failed):

  • promiseAllWorkflow | wrun_41M0K4BTJ60GV2HHJ2E9RJDVJG | 🔍 observability
  • sleepingWorkflow | wrun_41M0K4D4R10GG4JSN35R3HXW9P | 🔍 observability
  • parallelSleepWorkflow | wrun_41M0K4DVA30GK3XBDF5TAZG945 | 🔍 observability
  • nullByteWorkflow | wrun_41M0K4E3EF0GMPE61KJRM0CZEN | 🔍 observability
  • cancelRun - cancelling a running workflow | wrun_41M0K4TWF60GT5VSVK8WCG6J5K | 🔍 observability
  • cancelRun via CLI - cancelling a running workflow | wrun_41M0K4V1WC0GTTE1608PQARN0X | 🔍 observability
  • sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration | wrun_41M0K4VDDH0GJYC1RRD3W0JERJ | 🔍 observability
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_41M0K4WZVE0GH6SPKWMKS4QABC | 🔍 observability

sveltekit-node (8 failed):

  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K4N5010GR0ZHR7MJ0BDNMH | 🔍 observability
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K4JFBW0GMT0E6D6Q4ZJP5F | 🔍 observability
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K4NKJ10GK2NDACM4ZTHQV5 | 🔍 observability
  • distributedAbortController - reconnect to existing controller | wrun_41M0K4YDTB0GZWPBH04E9WENFT | 🔍 observability
  • setAttributes start: initial attributes are seeded on run creation
  • setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
  • setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
  • setAttributes fire-and-forget: void setAttributes lands without awaiting

sveltekit-quickjs (12 failed):

  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K4N5010GR0ZHR7MJ0BDNMH | 🔍 observability
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K4JFBW0GMT0E6D6Q4ZJP5F | 🔍 observability
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K4NKJ10GK2NDACM4ZTHQV5 | 🔍 observability
  • AbortController abortFromStepWorkflow: step abort cancels an in-flight sibling step
  • AbortController abortListenerWorkflow: signal.addEventListener fires on the deserialized step signal
  • AbortController abortDeterministicBranchFromStepWorkflow: branches stay consistent when abort comes from a step
  • setAttributes start: initial attributes are seeded on run creation
  • setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
  • setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
  • setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
  • setAttributes fire-and-forget: void setAttributes lands without awaiting
  • setAttributes Promise.all of disjoint-key writes: every key lands

tanstack-start-node (6 failed):

  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K4N5010GR0ZHR7MJ0BDNMH | 🔍 observability
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K4NKJ10GK2NDACM4ZTHQV5 | 🔍 observability
  • setAttributes start: initial attributes are seeded on run creation
  • setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
  • setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
  • setAttributes fire-and-forget: void setAttributes lands without awaiting

tanstack-start-quickjs (5 failed):

  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K4N5010GR0ZHR7MJ0BDNMH | 🔍 observability
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K4JFBW0GMT0E6D6Q4ZJP5F | 🔍 observability
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K4NKJ10GK2NDACM4ZTHQV5 | 🔍 observability
  • AbortController abortFromStepWorkflow: step abort cancels an in-flight sibling step
  • AbortController abortAnyInStepWorkflow: AbortSignal.any inside a step composes deserialized signals

vite-node (7 failed):

  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K4N5010GR0ZHR7MJ0BDNMH | 🔍 observability
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K4NKJ10GK2NDACM4ZTHQV5 | 🔍 observability
  • hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K4MF400GTNPRTV3K3KKTE3 | 🔍 observability
  • hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue | wrun_41M0K4R4BC0GQDMPMG1R3NM7GZ | 🔍 observability
  • setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
  • setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
  • setAttributes fire-and-forget: void setAttributes lands without awaiting

vite-quickjs (11 failed):

  • hookCleanupTestWorkflow - hook token reuse after workflow completion | wrun_41M0K4N5010GR0ZHR7MJ0BDNMH | 🔍 observability
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously | wrun_41M0K4JFBW0GMT0E6D6Q4ZJP5F | 🔍 observability
  • hookGetConflictWorkflow - hook.getConflict() resolves with the conflicting run when token is already registered | wrun_41M0K4NKJ10GK2NDACM4ZTHQV5 | 🔍 observability
  • hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable | wrun_41M0K4MF400GTNPRTV3K3KKTE3 | 🔍 observability
  • AbortController abortAnyInStepWorkflow: AbortSignal.any inside a step composes deserialized signals
  • setAttributes start: initial attributes are seeded on run creation
  • setAttributes start: reserved-prefix initial attributes are seeded with allowReservedAttributes
  • setAttributes setAttributesWorkflow: workflow-body calls append native attr_set events and merge correctly
  • setAttributes setAttributesInsideStepWorkflow: step-body calls append attributed native events
  • setAttributes fire-and-forget: void setAttributes lands without awaiting
  • setAttributes Promise.all of disjoint-key writes: every key lands

🪟 Windows (1 failed)

nextjs-turbopack-quickjs (1 failed):

  • cancelRun via CLI - cancelling a running workflow | wrun_41M0K4V1WC0GTTE1608PQARN0X

🌐 Cross-language Conformance (9 failed)

python (9 failed):

  • deploymentId: 'latest' is a no-op in non-Vercel worlds | wrun_01M0K4PGQWWAKNZSK73GYSJC49
  • promiseAllWorkflow | wrun_41M0K4BTJ60GV2HHJ2E9RJDVJG
  • sleepingWorkflow | wrun_41M0K4D4R10GG4JSN35R3HXW9P
  • parallelSleepWorkflow | wrun_41M0K4DVA30GK3XBDF5TAZG945
  • nullByteWorkflow | wrun_41M0K4E3EF0GMPE61KJRM0CZEN
  • cancelRun - cancelling a running workflow | wrun_41M0K4TWF60GT5VSVK8WCG6J5K
  • cancelRun via CLI - cancelling a running workflow | wrun_41M0K4V1WC0GTTE1608PQARN0X
  • sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration | wrun_41M0K4VDDH0GJYC1RRD3W0JERJ
  • resilient start: addTenWorkflow completes when run_created returns 500 | wrun_41M0K4WZVE0GH6SPKWMKS4QABC

⚠️ Flaky E2E Tests (passed on retry)

These tests failed at least once and passed on a retry. A recurring entry here is a real race worth investigating.

29 flaky tests
  • abortListenerWorkflow: signal.addEventListener fires on the deserialized step signal (nitro)
  • addTenWorkflow (hono)
  • cancelRun via CLI - cancelling a running workflow (nextjs-turbopack)
  • concurrent hook token conflict - two workflows cannot use the same hook token simultaneously (express)
  • distributedAbortController - manual abort triggers signal (sveltekit)
  • distributedAbortController - manual abort triggers signal (tanstack-start)
  • distributedAbortController - reconnect to existing controller (vite)
  • hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue (express)
  • hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue (nextjs-webpack)
  • hookAdoptOwnerResultWorkflow - duplicate adopts the owner result via conflict.returnValue (tanstack-start)
  • hookClaimOnlyMutexWorkflow - hook works as a pure run mutex without payload data (nextjs-webpack)
  • hookDisposeTestWorkflow - hook token reuse after explicit disposal while workflow still running (nextjs-webpack)
  • hookGetConflictThenStepParallelWorkflow - hook.getConflict() continuation step runs alongside other steps (nextjs-webpack)
  • hookMinRetentionWorkflow - terminal Hook cannot resume and its token stays unavailable (sveltekit)
  • parallelStepsThenWebhookWorkflow - no hook_conflict from same-tick replay race (express)
  • parallelStepsThenWebhookWorkflow - no hook_conflict from same-tick replay race (nitro)
  • Promise.all of disjoint-key writes: every key lands (astro)
  • Promise.all of disjoint-key writes: every key lands (express)
  • resume-or-start route pattern - resumeHook retried after start() reaches the new run (astro)
  • resume-or-start route pattern - resumeHook retried after start() reaches the new run (nextjs-webpack)
  • resume-or-start route pattern - resumeHook retried after start() reaches the new run (tanstack-start)
  • setAttributesInsideStepWorkflow: step-body calls append attributed native events (astro)
  • setAttributesInsideStepWorkflow: step-body calls append attributed native events (tanstack-start)
  • setAttributesInsideStepWorkflow: step-body calls append attributed native events (vite)
  • validation DX: invalid writes throw catchable FatalErrors naming rule and limit (nextjs-webpack)
  • webhookWorkflow (nextjs-webpack)
  • workflow throws after awaited setAttributes: attribute still persists on the failed run (nextjs-webpack)
  • workflow throws after awaited setAttributes: attribute still persists on the failed run (nitro)
  • workflow throws after awaited setAttributes: attribute still persists on the failed run (tanstack-start)

🛠 Infra Events (absorbed by the harness)

Platform anomalies the e2e harness detected and worked around (e.g. a run the queue never picked up, replaced by a fresh run). Clustered timestamps indicate a backend blip; a steady drip indicates a platform issue worth escalating.

32 infra events
  • cold-start-warmup · suite warmup (python) · at 21:43:13Z · abandoned wrun_41M0K4ANN90GQZ6Z4B1D2K7DTY · (+7 more)
  • run-pickup-stall · parallelSleepWorkflow (python) · at 21:43:29Z · abandoned wrun_41M0K4EAJC0GGB5PW97CV62SC5
  • run-pickup-stall · nullByteWorkflow (python) · at 21:43:29Z · abandoned wrun_41M0K4EAJE0GMSQ2XADVNZ28NK
  • run-pickup-stall · sleepingWorkflow (python) · at 21:43:29Z · abandoned wrun_41M0K4EAJC0GGB5PW97CV62SC4
  • run-pickup-stall · promiseAllWorkflow (python) · at 21:43:29Z · abandoned wrun_41M0K4EAJ80GREVZJHWPHBVWGR
  • run-pickup-stall · cancelRun - cancelling a running workflow (python) · at 21:43:29Z · abandoned wrun_41M0K4EAWY0GJH56E6HNWBF06W
  • run-pickup-stall · cancelRun - cancelling a running workflow (python) · at 21:44:01Z · abandoned wrun_41M0K4FA9Z0GGGGRMSP4ZY20E7
  • run-pickup-stall · parallelSleepWorkflow (python) · at 21:44:30Z · abandoned wrun_41M0K4G5Z70GHG7YGWG0N8FB2E
  • run-pickup-stall · promiseAllWorkflow (python) · at 21:44:30Z · abandoned wrun_41M0K4G5YR0GWCR0RSP0N2XMQ0
  • run-pickup-stall · nullByteWorkflow (python) · at 21:44:30Z · abandoned wrun_41M0K4G61T0GJ26P59PMC21P59
  • run-pickup-stall · sleepingWorkflow (python) · at 21:44:30Z · abandoned wrun_41M0K4G5W80GT9XQ44CX90XTVT
  • run-pickup-stall · cancelRun via CLI - cancelling a running workflow (python) · at 21:45:21Z · abandoned wrun_41M0K4G9P60GJ02XPYPW69RYKE
  • cold-start-warmup · suite warmup (python) · at 21:46:26Z · abandoned wrun_01M0K4GJA3MHHTHYBARY694XRN · (+7 more)
  • run-pickup-stall · promiseAllWorkflow (python) · at 21:46:41Z · abandoned wrun_01M0K4M7EXKGEG2STVEE13JKSP
  • run-pickup-stall · deploymentId: 'latest' is a no-op in non-Vercel worlds (python) · at 21:46:41Z · abandoned wrun_01M0K4M7EW2B08G0T7RCDSRWMC
  • run-pickup-stall · sleepingWorkflow (python) · at 21:46:41Z · abandoned wrun_01M0K4M7F2Y6XQCT33XPCM0HB4
  • run-pickup-stall · nullByteWorkflow (python) · at 21:46:41Z · abandoned wrun_01M0K4M7F6T3VTZZC53570CP5V
  • run-pickup-stall · parallelSleepWorkflow (python) · at 21:46:41Z · abandoned wrun_01M0K4M7F4K5B87CRZPG5YMWNV
  • run-pickup-stall · sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration (python) · at 21:47:01Z · abandoned wrun_41M0K4JXRT0GNYA1WCTRC241GS
  • run-pickup-stall · cancelRun via CLI - cancelling a running workflow (python) · at 21:47:01Z · abandoned wrun_41M0K4J7BJ0GQEG39HJZRGYCKP
  • cold-start-warmup · suite warmup (tanstack-start) · at 21:47:26Z · abandoned wrun_01M0K4N71DSRP368E97WK351VM
  • run-pickup-stall · promiseAllWorkflow (python) · at 21:47:41Z · abandoned wrun_01M0K4P22PVMQQYYQARTYFTYEQ
  • run-pickup-stall · deploymentId: 'latest' is a no-op in non-Vercel worlds (python) · at 21:47:41Z · abandoned wrun_01M0K4P22MBWBBHYHR8NYTKCYC
  • run-pickup-stall · parallelSleepWorkflow (python) · at 21:47:41Z · abandoned wrun_01M0K4P22SCY9JSSSW1V5A54E2
  • run-pickup-stall · sleepingWorkflow (python) · at 21:47:41Z · abandoned wrun_01M0K4P22V4M7SFD8AK3K7Q2X6
  • run-pickup-stall · nullByteWorkflow (python) · at 21:47:41Z · abandoned wrun_01M0K4P22ZBBZQRQ8RTTWXDF53
  • run-pickup-stall · cancelRun - cancelling a running workflow (python) · at 21:48:41Z · abandoned wrun_01M0K4QWPCZFQG9K4Z2C2HB382
  • run-pickup-stall · cancelRun via CLI - cancelling a running workflow (python) · at 21:48:41Z · abandoned wrun_01M0K4QWPKS392B46H25GTFRYJ
  • run-pickup-stall · sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration (python) · at 21:48:41Z · abandoned wrun_01M0K4QWPQ4BR2EX1DARHQZWQ2
  • run-pickup-stall · cancelRun - cancelling a running workflow (python) · at 21:49:11Z · abandoned wrun_01M0K4RT22E1B8JM0RV9FBEXJH
  • run-pickup-stall · cancelRun via CLI - cancelling a running workflow (python) · at 21:49:11Z · abandoned wrun_01M0K4RT28F9RHF5HWAPA7V7DF
  • run-pickup-stall · sleepInLoopWorkflow - sleep inside loop with steps actually delays each iteration (python) · at 21:49:41Z · abandoned wrun_01M0K4SQ9W2CS4KCT06AT5W1BE

E2E Test Summary

Summary
PassedFailedSkippedTotal
❌ ▲ Vercel Production33272517424320
✅ 💻 Local Development392205584480
✅ 📦 Local Production392205584480
✅ 🐘 Local Postgres392205584480
❌ 🪟 Windows31910320
❌ 🌐 Cross-language Conformance09132141
✅ vercel-multi-region270027
Total15439261254818248
Details by Category

❌ ▲ Vercel Production

AppPassedFailedSkipped
❌ astro-node124828
❌ astro-quickjs1201228
❌ example-node1221028
❌ example-quickjs1201228
❌ express-node125728
❌ express-quickjs1211128
❌ fastify-node125728
❌ fastify-quickjs1201228
❌ hono-node123928
❌ hono-quickjs1221028
❌ nest-node1201228
❌ nest-quickjs1181428
❌ nextjs-turbopack-node15253
❌ nextjs-turbopack-quickjs147103
❌ nextjs-webpack-node147103
❌ nextjs-webpack-quickjs14983
❌ nitro-node124828
❌ nitro-quickjs123928
❌ nuxt-node1221028
❌ nuxt-quickjs1221028
❌ python-node08152
❌ sveltekit-node14389
❌ sveltekit-quickjs139129
❌ tanstack-start-node126628
❌ tanstack-start-quickjs127528
❌ vite-node125728
❌ vite-quickjs1211128

✅ 💻 Local Development

AppPassedFailedSkipped
✅ astro-stable-node134026
✅ astro-stable-quickjs134026
✅ express-stable-node134026
✅ express-stable-quickjs134026
✅ fastify-stable-node134026
✅ fastify-stable-quickjs134026
✅ hono-stable-node134026
✅ hono-stable-quickjs134026
✅ nest-stable-node134026
✅ nest-stable-quickjs134026
✅ nextjs-turbopack-canary-node141019
✅ nextjs-turbopack-canary-quickjs141019
✅ nextjs-turbopack-stable-node16000
✅ nextjs-turbopack-stable-quickjs16000
✅ nextjs-webpack-canary-node141019
✅ nextjs-webpack-canary-quickjs141019
✅ nextjs-webpack-stable-node16000
✅ nextjs-webpack-stable-quickjs16000
✅ nitro-stable-node134026
✅ nitro-stable-quickjs134026
✅ nuxt-stable-node134026
✅ nuxt-stable-quickjs134026
✅ sveltekit-stable-node15307
✅ sveltekit-stable-quickjs15307
✅ tanstack-start-node134026
✅ tanstack-start-quickjs134026
✅ vite-stable-node134026
✅ vite-stable-quickjs134026

✅ 📦 Local Production

AppPassedFailedSkipped
✅ astro-stable-node134026
✅ astro-stable-quickjs134026
✅ express-stable-node134026
✅ express-stable-quickjs134026
✅ fastify-stable-node134026
✅ fastify-stable-quickjs134026
✅ hono-stable-node134026
✅ hono-stable-quickjs134026
✅ nest-stable-node134026
✅ nest-stable-quickjs134026
✅ nextjs-turbopack-canary-node141019
✅ nextjs-turbopack-canary-quickjs141019
✅ nextjs-turbopack-stable-node16000
✅ nextjs-turbopack-stable-quickjs16000
✅ nextjs-webpack-canary-node141019
✅ nextjs-webpack-canary-quickjs141019
✅ nextjs-webpack-stable-node16000
✅ nextjs-webpack-stable-quickjs16000
✅ nitro-stable-node134026
✅ nitro-stable-quickjs134026
✅ nuxt-stable-node134026
✅ nuxt-stable-quickjs134026
✅ sveltekit-stable-node15307
✅ sveltekit-stable-quickjs15307
✅ tanstack-start-node134026
✅ tanstack-start-quickjs134026
✅ vite-stable-node134026
✅ vite-stable-quickjs134026

✅ 🐘 Local Postgres

AppPassedFailedSkipped
✅ astro-stable-node134026
✅ astro-stable-quickjs134026
✅ express-stable-node134026
✅ express-stable-quickjs134026
✅ fastify-stable-node134026
✅ fastify-stable-quickjs134026
✅ hono-stable-node134026
✅ hono-stable-quickjs134026
✅ nest-stable-node134026
✅ nest-stable-quickjs134026
✅ nextjs-turbopack-canary-node141019
✅ nextjs-turbopack-canary-quickjs141019
✅ nextjs-turbopack-stable-node16000
✅ nextjs-turbopack-stable-quickjs16000
✅ nextjs-webpack-canary-node141019
✅ nextjs-webpack-canary-quickjs141019
✅ nextjs-webpack-stable-node16000
✅ nextjs-webpack-stable-quickjs16000
✅ nitro-stable-node134026
✅ nitro-stable-quickjs134026
✅ nuxt-stable-node134026
✅ nuxt-stable-quickjs134026
✅ sveltekit-stable-node15307
✅ sveltekit-stable-quickjs15307
✅ tanstack-start-node134026
✅ tanstack-start-quickjs134026
✅ vite-stable-node134026
✅ vite-stable-quickjs134026

❌ 🪟 Windows

AppPassedFailedSkipped
✅ nextjs-turbopack-node16000
❌ nextjs-turbopack-quickjs15910

❌ 🌐 Cross-language Conformance

AppPassedFailedSkipped
❌ python09132

✅ vercel-multi-region

AppPassedFailedSkipped
✅ nextjs-turbopack2700

📋 View full workflow run

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📊 Workflow Benchmarks

commit 236253d · Fri, 21 Aug 2026 22:17:54 GMT · run logs

Backend: vercel · app: nextjs-turbopack

MetricScenarioBest (ms)P75 (ms)P90 (ms)P99 (ms)Samples
TTFSstep223 (-77%) 💚1356 🔴 (+24%) 🔻1448 🔴 (+31%) 🔻2522 🔴 (+126%) 🔻30
TTFSstream343 (+47%) 🔻1362 🔴 (+25%) 🔻1396 🔴 (+22%) 🔻1475 🔴 (+15%)30
TTFShook + stream378 (-60%) 💚1768 🔴 (+30%) 🔻1830 🔴 (+31%) 🔻1862 🔴 (+30%) 🔻30
Fan-out TTFSPromise.all(100 steps)631 (+18%) 🔻1966 (+174%) 🔻2003 (+28%) 🔻2193 (+21%) 🔻10
Fan-out TTLSPromise.all(100 steps)1817 (+19%) 🔻3573 (-15%)3678 (-22%) 💚4761 (-3.3%)10
STSO1020 steps (inline)137 (+12%)203 (+6.8%)233 (+5.4%)420 (-6.0%)1019
WO1020 steps199958 (+9.2%)199958 (+9.2%)199958 (+9.2%)199958 (+9.2%)1
CRTTfirst chunk (pooled)105 (+15%) 🔻166 (+25%) 🔻189 (+11%)231 (+10%)28

Streams

ScenarioCRTT 1stp75p90p99CDV maxiters
paced control (100/s, 60B)142 (+34%)172 (+25%)234 (-15%)635 (+36%)167 (+13%)10
size sweep (100/s, 160B-12KB)145 (+24%)281 (+104%)425 (+12%)4202 (+356%)285 (+117%)10
replay gateway-gpt-5.4-nano-2000t (1x)145 (+1%)177 (+57%)255 (+55%)1016 (+32%)303 (-2%)3
replay eve-gpt-5.6-sol-2000t (1x)186 (+25%)167 (+31%)219 (+39%)549 (+102%)598 (+107%)2
replay eve-gpt-5.6-sol-2000t (2x)170 (+48%)319 (+98%)457 (+99%)933 (+57%)687 (+159%)3
📈 STSO distribution vs main (inline / queue-hop histograms)

1020 steps (inline)

Cumulative STSO time: main 182882ms → this run 199778ms (Δ +16896ms, +9%)

 100-150 ms ┃██████ main 214 this 10 -204
150-200 ms ████████████████████░░░┃ main 611 this 719 +108
200-250 ms █████░┃ main 135 this 217 +82
250-300 ms █┃ main 28 this 45 +17
300-350 ms ┃ main 11 this 10 -1
350-400 ms ┃ main 5 this 7 +2
400-450 ms ┃ main 6 this 3 -3
450-500 ms ┃ main 3 this 1 -2
500-550 ms ┃ main 1 this 1 +0
550-600 ms ┃ main 2 this 2 +0
600-650 ms ┃ main 1 this 1 +0
650-700 ms ┃ main 1 this 0 -1
700-750 ms ┃ main 1 this 0 -1
800-850 ms ┃ main 0 this 1 +1
1000-1050 ms ┃ main 0 this 1 +1
1150-1200 ms ┃ main 0 this 1 +1
📈 CRTT drill-down vs main (RTT distributions & profiles)
variant RTT 1ms→5s+ avg p50 p90 p99 n
control ······▂█▂▁··· 147.3 (+25%) 128 (+22%) 234 (-15%) 635 (+36%) 3000
sweep ······▂█▄▁·▁· 244 (+83%) 148 (+36%) 425 (+12%) 4202 (+356%) 3000
gw 1x ·····▁▂█▂▁▁·· 156.3 (+45%) 137 (+47%) 255 (+55%) 1016 (+32%) 5295
eve 1x ·····▁▃█▂▁··· 141.3 (+37%) 120 (+35%) 219 (+39%) 549 (+102%) 5186
eve 2x ·····▁▂█▅▁▁·· 200.2 (+46%) 155 (+38%) 457 (+99%) 933 (+57%) 7779

RTT over stream progress (avg per tenth of stream, bars scaled min→max):

control ▇▅▁▃▅█▆▃▁▃ 128–169ms
sweep ▂▁▁▂▂▁▁▂▆█ 155–537ms
gw 1x ▄▂▂▃▁▂▃█▁▂ 126–252ms
eve 1x ▁▇▂▂▁▄▅█▂█ 118–171ms
eve 2x ▁▂▃█▇▃▅▆▄▂ 158–255ms

RTT by chunk size (avg per log size bin, ~160B → ~12KB serialized, bars scaled min→max):

sweep ▂▃▂▂▁█▃ 241–252ms

Delivery jitter over stream progress (avg positive CDV per tenth of stream, bars scaled min→max):

control ▅▁▃▂▄▅▃▄▁█ 38–54ms
sweep ▁▂▂▂▃▁▃▂█▁ 62–191ms
gw 1x ▅▄▃▄▃▄▇█▁▄ 38–61ms
eve 1x ▁▆▃▃▃▅▄▅▂█ 25–38ms
eve 2x ▇▃▄▇█▃▃▁▁▇ 24–39ms
📜 Previous results (1)

5426321

Fri, 14 Aug 2026 19:45:01 GMT · run logs

vercel / nextjs-turbopack

MetricScenarioBest (ms)P75 (ms)P90 (ms)P99 (ms)Samples
TTFSstep1367 (+93%) 🔻1476 🔴 (+46%) 🔻1505 🔴 (+48%) 🔻1589 🔴 (+5.3%)30
TTFSstream431 (-55%) 💚1514 🔴 (+53%) 🔻1581 🔴 (+57%) 🔻1613 🔴 (+53%) 🔻30
TTFShook + stream1606 (+33%) 🔻1772 🔴 (+37%) 🔻1791 🔴 (+34%) 🔻1860 🔴 (+16%) 🔻30
Fan-out TTFSPromise.all(100 steps)897410306105481523210
Fan-out TTLSPromise.all(100 steps)1758618894191692500810
STSO1020 steps (inline)1221751973361019
WO1020 steps172599 (-55%) 💚172599 (-55%) 💚172599 (-55%) 💚172599 (-55%) 💚1
SLstream latency111 (+37%) 🔻153 🔴 (+16%) 🔻161 🔴 (+15%)302 🔴 (+69%) 🔻30
SOstream overhead (text)134 (+33%) 🔻180 (±0%)203 (±0%)399 (+60%) 🔻30
SOstream overhead (structured)125 (+26%) 🔻180 (+11%)201 (+3.1%)270 (+24%) 🔻30
ℹ️ Metric definitions & methodology

Streams: first-chunk RTT (the stream-open path, before any buffering/backpressure), CRTT percentiles, and worst delivery stall (CDV max). Cells are medians across iterations; per-run values in the artifacts. No 🔴/🟢 marks until targets attach.

The collapsed STSO distribution section above buckets every step gap, split inline (same warm process — pure framework overhead) vs queue-hop (fresh process — dispatch, reinit, replay). = main, = this run, = fill.

The collapsed CRTT drill-down: per-variant RTT histograms (fixed log bins, · = empty) and mean RTT/positive-CDV profile lines over stream progress and chunk size. Histograms, avgs, and profiles merge exactly across runs; p50–p99 are percentile-of-percentiles. Per-index rows live in the artifacts.

Best/P75/P90/P99 deltas compare against the most recent benchmark run on main at the time of this run. 🔻 flags a delta worse than +15%, 💚 one better than −15%.

Metrics — TTFS: time to first step body (in-deployment start() → first step body) · Fan-out TTFS: fan-out time to first step (in-deployment start() → first of the parallel step bodies to complete) · Fan-out TTLS: fan-out time to last step (in-deployment start() → last of the parallel step bodies to complete, i.e. when the Promise.all resolves) · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (whole-run time outside step bodies, in-deployment anchored) · CRTT: chunk round-trip time (per-chunk write → read latency, one clock domain: deployment → stream backend → same deployment) · CDV: chunk delay variation / delivery jitter (inter-arrival gap minus inter-write gap per seq-adjacent pair; skew-free; the row is each run's MAX positive value, so one stall moves it)

Scenarios — step: one trivial no-op step, no stream; no hooks, so the run stays in turbo mode (in-process fast path) · stream: one streaming step; no hooks, so the run stays in turbo mode (in-process fast path) · hook + stream: registers a hook before one step, which exits turbo mode (dispatch path) · 1020 steps: 1020 trivial sequential steps; STSO is measured between consecutive steps in the given step ranges, and WO is the whole-run overhead outside step bodies · Promise.all(100 steps): 100 trivial no-op steps started together in a single Promise.all; Fan-out TTFS is the first of them to complete and Fan-out TTLS the last, both from the in-deployment clientStart, so their gap is the spread the runtime adds across the fan-out · paced control (100/s, 60B): the control: 300 tiny (~60B) deltas metronome-paced at 100/s — zero workload structure, so it reads the transport floor and flush cadence, and disambiguates transport-wide vs workload-specific when a replay row moves · size sweep (100/s, 160B-12KB): same pacing as the control with deltas padded in rotation across seven log-spaced sizes (~160B–12KB) — rotation decouples size from stream position, so it isolates whether chunk size causes latency · replay gateway-gpt-5.4-nano-2000t (1x): raw provider SSE cadence captured at the AI gateway boundary (gpt-5.4-nano, the most popular gateway model; per-token deltas p50 208B = the modal production chunk size), replayed exactly as measured — the typical customer's workload; its CDV is the typical customer's real delivery jitter · replay eve-gpt-5.6-sol-2000t (1x): a captured eve turn (gpt-5.6-sol, the most-used demanding eve model; ~2000 output tokens = production p50 turn length) replayed exactly as measured — eve's envelope protocol re-ships the cumulative message so sizes ramp 142B→13KB; the demanding outlier tenant's reality · replay eve-gpt-5.6-sol-2000t (2x): the same eve capture at 2x — the headroom/stress row; real fast-tier models emit the same chunk sizes at proportionally higher rate, so time compression is a faithful speed model · first chunk (pooled): every run's seq-0 RTT pooled across all stream scenarios — the first chunk precedes any workload differentiation, so pooling samples one shared stream-open path with exact percentiles

Replay cadences (semantic sha256) — eve-gpt-5.6-sol-2000teaf22f5946e7c61f3c65c7006d550df180cfabd4e706254a09f22aec0cfb420d · gateway-gpt-5.4-nano-2000t6f24ac518b6b83ff1d0e85a5fe78230db192716d66a7fc6b2fe022752001d041

🔴 marks a percentile over its target (within target is left unmarked). Targets (p75/p90/p99, ms) — TTFS 200/300/600

All timestamps are deployment-side; runs are triggered in-deployment, so the CI runner and api.vercel.com sit outside every measured window. TTFS = start() → first step body (includes dispatch + any cold start); Fan-out TTFS/TTLS = first/last step completion of one Promise.all from the same anchor (the gap is the runtime’s fan-out spread); STSO/WO between step bodies; CRTT inside the workflow (excludes the api.vercel.com read path).

Cold starts stay in the numbers (real bursty-workload latency, inflates P75+); Best is the warm floor.

@VaguelySeriousVaguelySerious added the event-log-race-repro Run the event log race reproduction job label Aug 14, 2026
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Sim World

Simulated world deterministic testing for races. Traces

🟠 world-sim scenario book — 1 fail of 41 total

fence=per-spec

scenariooutcomeeventsvirtreplayviolations
smoke-no-stepscompleted30msok0
smoke-one-stepcompleted60msok0
hook-at-step-startedcompleted120msok0
hook-at-step-completedcompleted120msok0
hook-at-hook-createdcompleted120msok0
deadline-hook-winscompleted71.0hok0
deadline-expirescompleted71.0hok0
long-sleepcompleted1130.0dok0
hook-never-arrivesstalled30msskipped0
step-retries-twicecompleted102.0sok0
parallel-stepscompleted90msok0
hook-on-execution-statecompleted120msok0
peek-hook-before-branchcompleted120msok0
peek-hook-after-branchcompleted120msok0
peek-hook-at-registrationcompleted120msok0
race-hook-before-probecompleted120msok0
race-hook-after-probecompleted120msok0
race-duplicate-deliverycompleted130msok0
attr-hook-before-stepcompleted110msok0
attr-hook-after-stepcompleted110msok0
attr-from-step-bodycompleted130msok0
fork-hook-after-timeoutcompleted141.0mok0
fork-hook-before-timeoutcompleted141.0mok0
count-hook-after-timeoutcompleted171.0mok0
count-hook-before-timeoutcompleted201.0mok0
stale-read-step-count-forkcompleted201.0mok0
stale-read-equal-step-countscompleted141.0mok0
step-vs-step-forkcompleted120msok0
step-vs-step-fork-fencedcompleted120msok0
fence-catches-benign-directioncompleted125msok0
in-flight-before-decisioncompleted171.0mok0
in-flight-before-decision-countedcompleted171.0mok0
in-flight-after-decisioncompleted192.0mok0
stale-read-step-count-fork-fencedcompleted201.0mok0
fork-hook-winscompleted131.0mok0
fork-timeout-winscompleted131.0mok0
unclaimed-payload-under-forkcompleted171.0mok0
claimed-payload-under-forkcompleted171.0mok0
writers-independent-step-bodiescompleted120msok0
writers-scripted-tempocompleted120msok0
cancel-mid-stepcancelled70msskipped0

Full trace: world-sim.txt

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Event Log Race Repro

  • vercel2/20 regressions — 2 stuck
  • local clean, 20 runs
  • postgres clean, 20 runs

Run History

RunLaneTotalCompleteCorruptStuckOther
08-14 19:29vercel1414000
local1414000
postgres1414000
08-20 22:46vercel2016400
local2016400
postgres2018200
08-21 21:53vercel2018020
local2020000
postgres2020000

Latest Non-Completed Runs

LaneScenarioAttemptOutcomeRun
vercelhook-storm1stuckwrun_41M0K4HGRM0GTVDJT6J0BHPDEQ
vercelblocked-branch1stuckwrun_41M0K4RWFQ0GXG1KQMSR172KJF
Config

vercel: 20 runs / step-storm 6, hook-storm 6, blocked-branch 6, hook-sleep 2 / c8 / 6x8 / watchdog 2500ms / step 2200±250ms / stagger 400ms / burst 4000+1200ms / poke 750ms / poke budget 64 then /8 / timeout 240000ms

local, postgres: 20 runs / step-storm 6, hook-storm 6, blocked-branch 6, hook-sleep 2 / c8 / 6x8 / watchdog 2500ms / step 2200±250ms / stagger 400ms / burst 4000+1200ms / poke 750ms / poke budget 64 then /8 / timeout 480000ms

VaguelySeriousand others added 2 commits August 20, 2026 15:32
#3696 added five blocked-branch dispatch inputs and wired them into the Vercel
job only, so a dispatch tuning that scenario reached one lane and left the other
two on harness defaults — the silent per-lane divergence the inputs' own comment
warns about. Every EVENT_LOG_RACE_REPRO_* knob now reaches both jobs.
Also names the fourth scenario in the AGENTS.md intro, which still said three.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Signed-off-by: Peter Wielander <peter.wielander@vercel.com>
@VaguelySerious
VaguelySerious marked this pull request as ready for review August 21, 2026 22:30
@VaguelySerious
VaguelySerious requested a review from a team as a code ownerAugust 21, 2026 22:30
@VaguelySerious
VaguelySerious merged commit 9760f64 into mainAug 21, 2026
140 of 171 checks passed
@VaguelySerious
VaguelySerious deleted the peter/repro-poke-decay branch August 21, 2026 22:31
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No backport to stable for 9760f64 (AI decision).

This is tuning of the main-only event-log-race-repro investigation harness: it adds a new POKE_DECAY_FACTOR knob and dispatch input, and raises a run timeout in scripts/event-log-race-repro-local.sh. It builds directly on main-only work — stable has no local lanes in .github/workflows/event-log-race-repro.yml, no scripts/event-log-race-repro-local.sh, and no poke-budget/blocked-branch scenario — so most of the change has nothing to apply to. It is not a fix to functionality or a flaky test on stable.

To override, re-run the Backport to stable workflow manually via workflow_dispatch and paste this commit SHA into the ref input:

9760f640bb79337591e22b7e4c1de7366c6489e3

pranaygp added a commit that referenced this pull request Aug 21, 2026
* origin/main:
Run the test suites CI was silently skipping (#3733)
[e2e] Change race repro hook poke to soft-degrade instead of hard-stop at budget (#3561)
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